© 2014 MLB Advanced Media, L.P. All rights reserved.

7/4/2014 3:22 P.M. ET

Girardi: Sabathia's season likely in jeopardy

MINNESOTA -- Yankees manager Joe Girardi said Friday that it's "probably fair to say" CC Sabathia could miss the remainder of the season.

The Yankees won't know for sure what Sabathia's official status is until he meets with Dr. James Andrews on July 14.

The left-hander made a rehab start for Double-A Trenton on Wednesday, but then experienced swelling in his right knee on Thursday morning. The team had him undergo an MRI, and will hold any official decisions until he sees the esteemed Andrews.

"He's going to see Andrews a week from Monday," Girardi said. "The MRI didn't reveal anything new. It's what we saw. I'm sure surgery is possible. So they've got to talk about it and decide what's best."

Girardi was asked about the possibility of microfracture surgery for Sabathia.

"That's always a possibility when you have a degenerative knee," Girardi said. "That could be one of the steps. That's a surgery that a lot of players don't want to hear that they need to have. It's a pretty long rehab."

Sabathia was placed on the 60-day DL on May 11.

Robertson flying under radar in Yanks' bullpen

MINNESOTA -- David Robertson has quietly filled the shoes of legendary closer Mariano Rivera this season.

Robertson's 19 saves ranked third best in the American League entering Friday, and his 2.83 ERA is one of a four sub-3 marks in an excellent Yankees bullpen. In short, he's done his job well, with some big help from setup man Dellin Betances, who has taken much of the spotlight with his 1.47 ERA.

"Maybe with the emergence of Betances, and him being the talk of our bullpen in a sense, Robertson has fallen under the radar," manager Joe Girardi said. "Maybe it's expected in New York -- you're supposed to be that good because of the guy we had for so long."

Rivera, of course, retired after last season with a career 2.21 ERA and an all-time best 652 saves. The Yankees' current closer has a long way to go to be considered a New York icon, but Robertson has dealt well with the pressure of following in Rivera's footsteps.

"If you look at his numbers, they're extremely impressive," Girardi said. "I mean, they're incredible. So he has flown under the radar. It's not a bad thing, in a sense, because of the shoes he was expected to step in to. So it's probably not a bad thing."

Twins mark anniversary of Gehrig's speech with tribute

MINNESOTA -- The Twins paid tribute to Lou Gehrig on Friday, the 75th anniversary of his "Luckiest Man" speech, by playing a special video on the stadium's big screen.

The video -- which was played in different forms across the country on Friday -- featured Derek Jeter, Joe Mauer and various other Yankees and Twins reciting different parts of Gehrig's famous speech.

Before Friday's game, manager Joe Girardi reflected on Gehrig's important place in history.

"I think it's an important day, obviously in American history," Girardi said. "But it's also an important day in Yankee history, what Lou Gehrig represented. The type of player he was. The type of man he was. And what he meant to this organization. So it's a really special day."

Players, coaches and umpires across MLB wore special 75th-anniversary patches on their sleeves during Friday's games. The league also donated $300,000 to three organizations leading the fight against ALS (Amyotrophic Lateral Sclerosis).

"When Lou Gehrig delivered his historic farewell speech at Yankee Stadium 75 years ago, he indelibly linked our National Pastime to the fight against the disease that would bear his name," Commissioner Bud Selig said. "As the fight continues today, it is our privilege to pay tribute to the Iron Horse's enduring legacy of courage and nobility. In his memory, and for all those who are affected by ALS, Major League Baseball is honored to do its part to advance the cause in the hopes of finding a cure."

Alex M. Smith is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.